Segment Reporting and Information about Geographic Areas - Schedule of Revenues by Geographic Area (Detail) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 7,384	$ 6,303	$ 6,350	$ 4,541	$ 7,226	$ 6,824	$ 4,002	$ 3,409	$ 24,578	$ 21,461	$ 11,759
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									12,653	14,872	6,221
China [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									2,979	1,757	2,027
Netherlands [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									1,590	965	331
Norway [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									1,201	813	823
Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									$ 6,155	$ 3,054	$ 2,357